I use a rocket blower initially and when that doesn't work I revert to more drastic measures. Drastic measures I don't have to apply that often even though I do take of the back quite regularly.
I use pec-pads and eclipse fluid (alcohol) (the same stuff as sensor swab). I use a tissue on both sides only once and swipe with my hands/fingers.
I have been doing this for years now and have never had one single problem. I think there are numerous ways of doing it, everything that doesn't scratch the glass of the IR/AA filter, takes of the dirt is fine.